You can download the app directly on your device through the Windows Phone Store or by using the following link:
Press the Search button on your Windows Phone, tap Vision and then scan the following barcode by pointing your device camera toward it
Tap and hold the screen to create short, looping videos with sound. Camera tools, like grid and ghost, help you shoot like a pro, and, of course, you can put yourself in the action with your front-facing camera. Check out Explore to view popular posts, browse through channels, or see what’s trending, and discover which of your friends are already on Vine with Find People.
Unique to Windows Phone, you can pin your favorite Vine accounts to your homescreen, and use Pivots to easily switch between your apps.
Vine for Windows Phone has the following features:
- Free, unlimited uploads
- Instantly post videos on Vine, then share to Twitter and Facebook!
- Find, follow, and interact with people close to you
- Explore trending posts, featured hashtags and editor's picks
- Pin favorite Vine accounts and channels to your home screen
- Connect to Vine from within camera mode
- Pin the Vine camera to your home screen and launch with one tap
source - Vine Blog